Cockroaches

Cockroaches are primitive insects whose origin extends back at least 300 million years and are thought to have originated in the tropical and sub-tropical areas of Africa. The advent of travel and international trade has brought about the spread of cockroaches to most countries in the world. Although worldwide there are over 3,000 species of cockroaches, only half a dozen have attained the status of pest species by adapting themselves to cohabit with humans. The remaining non-pest species inhabit decaying plant material, dark damp areas such as caves, and beneath the bark of rotting trees. Cockroaches are nocturnal and are seldom seen in great numbers during daylight hours, but it is generally accepted that for every cockroach seen there are at least a further ten hidden away in out of sight harbourages. Most common species have wings, but tend to crawl rather than fly. When disturbed, cockroaches have the ability to scurry away with remarkable haste.

Simple Prevention

Common harbourages include cracks and crevices, dishwashers, electrical motors and switches, ovens and almost any warm, moist area where food is available. Tell tale signs indicating cockroach activity include the presence of egg cases, regurgitation marks, faecal pellets, odour and cast-off nymphal skins.

Infestation occurs when cockroaches are carried into premises on raw materials or packaging or gain entry to the premises through drain covers, ventilation openings and under doors

Inside, remove the causes of dampness by fixing leaking pipes & fridges, and the humidity caused when dishwashers and clothes dryers are not adequately ventilated. Eliminate entrances and hiding places by sealing cracks and crevices around doorframes, cupboards, pipes, tiles etc. Improve sub floor ventilation if inadequate.

Outside, garden beds should be at least 1 metre from the building. Place fine mesh over vents and into brick wall weep holes and keep the perimeter of the building dry.

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